51457171 has 4 divisors (see below), whose sum is σ = 51478344. Its totient is φ = 51436000.

The previous prime is 51457169. The next prime is 51457207. The reversal of 51457171 is 17175415.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51457171 - 2¹ = 51457169 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51457271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6385 + ... + 11986.

It is an arithmetic number, because the mean of its divisors is an integer number (12869586).

Almost surely, 2^51457171 is an apocalyptic number.

51457171 is a deficient number, since it is larger than the sum of its proper divisors (21173).

51457171 is a wasteful number, since it uses less digits than its factorization.

51457171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21172.

The product of its digits is 4900, while the sum is 31.

The square root of 51457171 is about 7173.3653887140. The cubic root of 51457171 is about 371.9477780588.

The spelling of 51457171 in words is "fifty-one million, four hundred fifty-seven thousand, one hundred seventy-one".